TLK111PT datasheet(79/109 Pages) TI1

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TLK111

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SLLSEF8A – AUGUST 2013 – REVISED NOVEMBER 2013

Table 8-44. Cable Diagnostic Specific Control Register (CDSCR), address 0x0170 (continued)

BIT

BIT NAME

DEFAULT

DESCRIPTION

Diagnostic TPTD

0,RW

TPTD Diagnostic Bypass

Bypass

1 = Bypass TPTD diagnostic. TDR on TPTD pair will not be executed.

0 = TDR is executed on TPTD pair

In bypass TPTD, results are available in TPRD slots.

Diagnostic TPRD

0,RO

TPRD Diagnostic Bypass

Bypass

1 = Bypass TPRD diagnostic. TDR on TPRD pair will not be executed.

0 = TDR is executed on TPRD pair

RESERVED

1,RW

RESERVED: Must be Set to 1.

10:8

Diagnostics Average

<110>,RW

Number Of TDR Cycles to Average:

Cycles

<000>: 1 TDR cycle

<001>: 2 TDR cycles

<010>: 4 TDR cycles

<011>: 8 TDR cycles

<100>: 16 TDR cycles

<101>: 32 TDR cycles

<110>: 64 TDR cycles (default)

<111>: Reserved

7:0

RESERVED

0,RO

RESERVED: Writes ignored, read as 0.

Table 8-45. Cable Diagnostic Specific Control Register 2 (CDSCR2), address 0x0171

BIT

BIT NAME

DEFAULT

DESCRIPTION

15:4

RESERVED

<1100 1000 RESERVED: Ignore on read

0101>, RW

3:0

TDR pulse control

<1100>,

Configure expected self reflection in TDR

Table 8-46. Cable Diagnostic Specific Control Register 3 (CDSCR3), address 0x0173

BIT

BIT NAME

DEFAULT

DESCRIPTION

15:8

Cable length cfg

<1111

Configure duration of listening to detect long cable reflections

1111>, RW

7:0

RESERVED

<0001

RESERVED: Ignore on read

1110>, RW

Table 8-47. Cable Diagnostic Specific Control Register 4 (CDSCR4), address 0x0177

BIT

BIT NAME

DEFAULT

DESCRIPTION

15:13

RESERVED

<000>, RW

RESERVED: Ignore on read

12:8

Short cables TH

<1 1000>,

TH to compensate for strong reflections in short cables

7:0

RESERVED

<1001

RESERVED: Ignore on read

0110>, RW

8.13.3 Cable Diagnostic Location Results Register 1 (CDLRR1)

This register provides the peaks locations after execution of the TDR. The values of this register are valid

after reading 1 in Diagnostic Done bit 1 in register CDCR (0x1E).

Table 8-48. Cable Diagnostic Location Results Register 1 (CDLRR1), address 0x0180

BIT

NAME

DEFAULT

FUNCTION

15:8

TPTD Peak

<0000 0000>, RO

Location of the Second peak discovered by the TDR mechanism on Transmit Channel

Location 2

(TPTD). The value of these bits is translated into distance from the PHY

7:0

TPTD Peak

<0000 0000>, RO

Location of the First peak discovered by the TDR mechanism on Transmit Channel

Location 1

(TPTD). The value of these bits is translated into distance from the PHY

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